#include <iostream>

using namespace std;

int main() {

    /*
    int a = 123456;

    cout << "十万位: " << a / 100000 % 10 << endl;

    cout << "万  位: " << a / 10000 % 10 << endl;
    cout << "千  位: " << a / 1000 % 10 << endl;
    cout << "百  位: " << a / 100 % 10 << endl;
    cout << "十  位: " << a / 10 % 10 << endl;  // 123456 / 10 --> 12345 % 10

    cout << "个  位: " << a % 10 << endl;
    */

    /*
    int a = 5;
    cout << "a++ = " << a++ << ", a = " << a << endl;

    int b = 5;
    cout << "++b = " << ++b << ", b = " << b << endl;
    */

/*
    // bool a = true;
    bool a = -12345;
    bool b = false;

    cout << "a = " << a << endl;
    cout << "b = " << b << endl;
*/

/*
    bool a = (1 < 2) && (4 < 9);
    cout << "a = " << a << endl;
*/

/*
    int a = 2;

    if(a > 10) {
        cout << "Yes" << endl;
    }
*/

/*
    // 判断变量 n 是偶数还是奇数
    int n;

    cin >> n;
    if(n % 2 == 0) {
        cout << "偶数" << endl;
        cout << "HHHH" << endl;
    } else
        cout << "奇数" << endl;
*/

    // 设计一个简单的计算器，只能做 +  -  * / 的运算
    int a, b;
    char s;

    cin >> a >> s >> b;
    if(s == '+') {
        cout << "a + b = " << a + b << endl;
    } else if(s == '-') {
        cout << "a - b = " << a - b << endl;
    } else if(s == '*') {
        cout << "a * b = " << a * b << endl;
    } else if(s == '/') {
        cout << "a / b = " << a / b << endl;
    } else {
        cout << "NO" << endl;
    }


    return 0;
}
